Network Controller Within Core Network and Method for Connection with Terminal by Network Controller

1. A method for processing control information by a base station (BS) in a communication system comprising a mobility management entity (MME), the BS comprising a module controlling a first radio access technology (RAT) associated with a cellular access interface and a second RAT associated with a wireless local area network (WLAN) interface, the method comprising: receiving, by the BS, an association request from a user equipment (UE) supporting multiple RATs; in response to the association request, changing, by the BS, a state of the module into an activated state and a state of the second RAT into a connected state; establishing, by the BS, a WLAN connection with the UE; receiving, by the BS, a Non-Access Stratum (NAS) protocol message on the established WLAN connection to allow the UE to be directly attached to the MME via the WLAN interface; and in response to the NAS protocol message, transmitting, by the BS, an initial UE message including a first identifier (ID) indicating the BS and a second ID indicating the second RAT to the MME enabling the MME to transition from an idle state to a connected state.

2. The method of claim 1 , wherein the UE is detached to the MME, if the state of the module is changed into a deactivated.

3. The method of claim 1 , wherein the UE is attached to the MME, if a connection between the UE and the BS based on any one of the cellular access interface and the WLAN interface is changed to another.

4. The method of claim 1 , wherein the UE is attached to the MME, if the UE and the BS are connected through any one of the cellular access interface and the WLAN interface.

5. The method of claim 1 , wherein establishing the WLAN connection with the UE includes receiving a node identifier indicating an authentication scheme for the WLAN connection.

6. A base station configured to process control information in a communication system comprising a mobility management entity (MME), the base station comprising: a signal transmitting and receiving unit; and a processor connected to the signal transmitting and receiving unit, wherein the processor includes a module controlling a first radio access technology (RAT) associated with a cellular access interface and a second RAT associated with a wireless local area network (WLAN) interface, and wherein the processor is configured to: receive an association request from a user equipment (UE) supporting multiple RATs; in response to the association request, changing, by the BS, a state of the module into an activated state and a state of the second RAT into a connected state; establish, by the BS, a WLAN connection with the UE; receive a Non-Access Stratum (NAS) protocol message on the established WLAN connection to allow the UE to be directly attached to the MME via the WLAN interface; and in response to the NAS protocol message, transmit an initial UE message including a first identifier (ID) indicating the BS and a second ID indicating the second RAT to the MME enabling the MME to transition from an idle state to a connected state.

7. The base station of claim 6 , wherein the UE is detached to the MME, if the state of the module is changed into a deactivated.

8. The base station of claim 6 , wherein the UE is attached to the MME, if a connection between the UE and the BS based on any one of the cellular access interface and the WLAN interface is changed to another.

9. The base station of claim 6 , wherein the UE is attached to the MME, if the UE and the BS are connected through any one of the cellular access interface and the WLAN interface.